Distortion Optimization of Model-Based Secure Embedding Schemes for Data-Hiding

  • Authors:

  • Benjamin Mathon;Patrick Bas;François Cayre;Fernando Pérez-González

  • Affiliations:

  • Gipsa-Lab Département Images et Signal, Domaine universitaire, Saint Martin d'Hères cedex, France 38402;Gipsa-Lab Département Images et Signal, Domaine universitaire, Saint Martin d'Hères cedex, France 38402;Gipsa-Lab Département Images et Signal, Domaine universitaire, Saint Martin d'Hères cedex, France 38402;Departamento de Teoría de la Señal y las Comunicaciones Signal Processing in Communications Group, Universidad de Vigo, Vigo, Spain 36200

  • Venue:
  • Information Hiding
  • Year:
  • 2008

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Abstract

This paper is the continuation of works about analysis of secure watermarking schemes in the case of WOA (Watermarked Only Attack) framework. In previous works, two new BPSK spread-spectrum watermarking modulations, Natural Watermarking (NW) and Circular Watermarking (CW), have been proposed and have been shown to be more secure than classical modulations. Because security is guaranted using specific distributions of watermarked contents, we propose to use optimal model-based embedding to ensure security while minimizing the overall distortion. Additionally, we propose a new secure watermarking scheme based on distribution of vector norms in the Gaussian case. We illustrate model-based embedding performance in the case of Gaussian signals and show that this approach not only allows to achieve excellent level of security in the WOA framework, but also allows to minimize distortion. Finally, a comparison of the robustness of the proposed embedding schemes is performed.